APA
Grzimek B., . (1975). Grzimek's animal life encylopedia. New York: Van Nostrand Reinhold Co.
Chicago
Grzimek Bernhard, . 1975. Grzimek's animal life encylopedia. New York: Van Nostrand Reinhold Co.
Harvard
Grzimek B., . (1975). Grzimek's animal life encylopedia. New York: Van Nostrand Reinhold Co.
MLA
Grzimek Bernhard, . Grzimek's animal life encylopedia. New York: Van Nostrand Reinhold Co. 1975.