Gaya APA

Inc, S, L, P. (2005). Encyclopedia Americana Volume 20 : Navajo to Opium . United States of America: Scholastic Library Publishing, Inc.

Gaya MLA

Inc, Scholastic, Library, Publishing,. "Encyclopedia Americana Volume 20 : Navajo to Opium". United States of America: Scholastic Library Publishing, Inc, 2005. Teks.