The singular possessive form is bureau's.
The plural forms are bureaus or bureaux (both are accepted).
The plural possessive forms are bureaus' or bureaux's. (they are pronounced the same, the x is silent)
Museum is singular. Museum's is singular possessive. Museums is plural. Museums' is plural possessive.
The singular possessive is biker's; the plural possessive is bikers'.
Niece's is a singular possessive noun. niece - singular nieces - plural niece's - singular possessive nieces' - plural possessive
The word sisters' is plural possessive. The singular is sister, singular possessive is sister's; the plural is sisters, the plural possessive is sisters'.
The singular possessive is army's.The plural possessive is armies'.
The singular possessive is avocado's; the plural possessive is avocados'.
The singular possessive of "ant" is "ant's" and the plural possessive is "ants'".
The possessive form for the singular noun bureau is bureau's.Example: A news bureau's integrity is based on its history.
Women's is a plural possessive. The singular possessive is woman's
The singular possessive form is heart's; the plural possessive form is hearts'.
The singular possessive is author's. The plural possessive is authors'.
The singular possessive is author's. The plural possessive is authors'.