Gaya APA

Britannica Student Encyclopedia. (2007). : Encyclopedia Britannica, Inc.

Gaya Chicago

Britannica Student Encyclopedia. . : Encyclopedia Britannica, Inc, 2007. Text.

Gaya MLA

Britannica Student Encyclopedia. . : Encyclopedia Britannica, Inc, 2007. Text.

Gaya Turabian

Britannica Student Encyclopedia. : Encyclopedia Britannica, Inc, 2007. Print.