Gaya APA

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

Gaya MLA

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