APA استشهاد

Lieber, E. (1964). Occupational health: Guide to safe guards against employee sickness and accident. Business.

استشهاد بنمط شيكاغو

Lieber, E.E. Occupational Health: Guide to Safe Guards Against Employee Sickness and Accident. London: Business, 1964.

MLA استشهاد

Lieber, E.E. Occupational Health: Guide to Safe Guards Against Employee Sickness and Accident. Business, 1964.