Gaya APA

Timoshenko, S., D.H., I, Y. (1968). Elements of strength of materials . New York: New York: D. Van Nostrand ; 1968.

Gaya MLA

Timoshenko, S.., D.H., I., Young,. "Elements of strength of materials". New York: New York: D. Van Nostrand ; 1968, 1968. Text.