Cita APA (7th ed.)

Hahn, D. B., & Payne , W. A. (2001). Focus on health (5th ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Hahn, Dale B., i Wayne A. Payne. Focus on Health. 5th ed. Boston: McGraw-Hill, 2001.

Cita MLA (9th ed.)

Hahn, Dale B., i Wayne A. Payne. Focus on Health. 5th ed. McGraw-Hill, 2001.