Citazione Stile APA (7a Edizione)

Merrill, R. J., & Ridgway, D. W. (1969). The CHEM study story. W. H. Freeman.

Citazione stile Chigago Style (17a edizione)

Merrill, Richard J., e David W. Ridgway. The CHEM Study Story. San Francisco, [Calif.]: W. H. Freeman, 1969.

Citatione MLA (9a ed.)

Merrill, Richard J., e David W. Ridgway. The CHEM Study Story. W. H. Freeman, 1969.