Gaya APA

BRITANNICA, T, N, E. (1979). THE NEW ENCYCLOPAEDIA BRITANNICA:IN 30 VOLUMES;KNOWLEDGE IN DEPTH;VOL. 19 (15th). Chicago: Encyclopaedia Britannica,INC.

Gaya MLA

BRITANNICA, THE, NEW, ENCYCLOPAEDIA. "THE NEW ENCYCLOPAEDIA BRITANNICA:IN 30 VOLUMES;KNOWLEDGE IN DEPTH;VOL. 19". 15th Chicago: Encyclopaedia Britannica,INC, 1979. Textbook.