The correct MLA format for a single author of a book is: Author's Last Name, First Name. Title of the Book. Place of Publication: Publisher, Year. Medium of Publication. For example, Rowling, J.K. Harry Potter and The Goblet of Fire. London: Bloomsbury, 2002. Print.
The former. The style belongs to the author, and therefore a possessive is required. The one with the apostrophe is the possessive form, assuming that the style belongs to only one author. If there were more than one author with the same style, it would be "authors' style". The one without the apostrophe is gibberish.
In MLA documentation style, authors are typically cited within the text by including the author's last name and the page number where the information was found in parentheses at the end of the sentence. If the author's name is mentioned in the sentence, only the page number needs to be included in parentheses.
MLA
In APA style, the correct format for citing sources in a footnote includes the author's name, publication year, title of the source, and publication information.
The correct format for an APA style paper heading includes the title of the paper, the author's name, and the institutional affiliation. The title should be centered, the author's name should be centered below the title, and the institutional affiliation should be centered below the author's name.
That is a UPC style code that identifies the book to the library system.
The two important steps in in-text documentation are citing the source within the text of your document and providing a corresponding entry in the bibliography or reference list at the end of your document.
MLA
Richard C Roistacher has written: 'A style manual for machine-readable data files and their documentation' -- subject(s): Information storage and retrieval systems, Electronic data processing documentation, Machine-readable bibliographic data
citation
An example of a citation in APA documentation style is: Smith, J. (2019). The impact of climate change on biodiversity. Environmental Science Journal, 15(2), 45-56.
In Harvard style, the correct format for citing a reference book includes the author's last name, first initial, year of publication, title of the book in italics, place of publication, and the publisher.