APA Style

PIGNANI, T, J., HAGGARD, P, W. (1968). Elements of Trigonometry (1). New York: Harcourt Brace & World, Inc..

MLA Style

PIGNANI, TULLIO, J.., HAGGARD, PAUL, W.. "Elements of Trigonometry". 1 New York: Harcourt Brace & World, Inc., 1968. Text.