APA Style

Berenstain, Stan, Berenstain, Jan. (1975). Bears' nature guide . USA: Random House.

Chicago Style

Berenstain, Stan, Berenstain, Jan. Bears' nature guide. USA: Random House, 1975. Text.

MLA Style

Berenstain, Stan, Berenstain, Jan. Bears' nature guide. USA: Random House, 1975. Text.

Turabian Style

Berenstain, Stan, Berenstain, Jan. Bears' nature guide. USA: Random House, 1975. Print.