Gaya APA

BUCK, R, C., Willcox, A, B. (1971). CALCULUS OF SEVERAL VARIABLES . New York: HOUGHTON MIFFLIN.

Gaya MLA

BUCK, R., Creighton., Willcox, Alfred, B.. "CALCULUS OF SEVERAL VARIABLES". New York: HOUGHTON MIFFLIN, 1971. Textbook.