APA استشهاد

Lehr , R. E., & Marchand , A. P. (1972). Orbital symmetry: A problem solving approach. Academic press.

استشهاد بنمط شيكاغو

Lehr , Ronad E., و Alan P. Marchand. Orbital Symmetry: A Problem Solving Approach. New York: Academic press, 1972.

MLA استشهاد

Lehr , Ronad E., و Alan P. Marchand. Orbital Symmetry: A Problem Solving Approach. Academic press, 1972.