Cita APA (7th ed.)
Lawrence ,Thomas Gor, Power,Douglas F, Shriver , A., & Vorhaus, J. Your health and safety (6th ed.). Harcourt,Brace and World ,Inc.
Cita Chicago (17th ed.)
Lawrence ,Thomas Gor, Power,Douglas F, Alice Shriver , i J.Louis Vorhaus. Your Health and Safety. 6th ed. New York: Harcourt,Brace and World ,Inc.
Cita MLA (9th ed.)
Lawrence ,Thomas Gor, et al. Your Health and Safety. 6th ed. Harcourt,Brace and World ,Inc.
Atenció: Aquestes cites poden no estar 100% correctes.