APA (7e ed.) Bronvermelding

Bullens, D. K. (1938). Steel and its heat treatment (4th ed. rewritten and reset.). John Wiley.

Chicago (17e ed.) Bronvermelding

Bullens, Denison Kingsley. Steel and Its Heat Treatment. 4th ed. rewritten and reset. New York: John Wiley, 1938.

MLA (8e ed.) Bronvermelding

Bullens, Denison Kingsley. Steel and Its Heat Treatment. 4th ed. rewritten and reset. John Wiley, 1938.