Well I think the copyright date is the published date of a book. So the published date for this book would be 1999
publication date or release date
That is the last date in which the book was published or sent to print.
We need the name of the book. But, the date when a book is published is usually printed on the inside title page.
It was published in 2003
1934 was the first book.
The book"s first copyright date is 1992
The first Tintin comic was published in 1929, Tintin in the Land of the Soviets.
The book was published by Arthur Miller in 1980
It was published in 2008.
If there is no Author, just cite the book title, date it was published, what company produced the book.
The more famous book, by Rabindranath Tagore, was published in 1913. There is a Bengali book of the same name published in 1910.