Cita APA (7a ed.)

Pugh, D. (1921). A problem course in chemistry Q. Allyn & Bacon.

Cita Chicago Style (17a ed.)

Pugh, D.B. A Problem Course in Chemistry Q. Boston: Allyn & Bacon, 1921.

Cita MLA (9a ed.)

Pugh, D.B. A Problem Course in Chemistry Q. Allyn & Bacon, 1921.