Sun Tzŭ on The art of war :
the oldest military treatise in the world /
translated from the Chinese with introduction and critical notes by Lionel Giles.

APA Citation

Sunzi, a. 6th century B.C., Giles, L. (1974). Sun Tzŭ on The art of war: the oldest military treatise in the world. [Hong Kong?]: Hong Kong Book Co..

MLA Citation

Sunzi, active 6th century B.C, and Lionel Giles. Sun Tzŭ On The Art of War: the Oldest Military Treatise In the World. [Hong Kong?]: Hong Kong Book Co., 1974.

Warning: These citations may not always be complete (especially for serials).