Παραπομπή σε μορφή APA (7η εκδ.)

George, J. B. (1990). Nursing theories: The base for professional nuesing practice (3rd edition.). Prentice-Hall.

Παραπομπή σε μορφή Chicago (17η εκδ.)

George, Julia B. Nursing Theories: The Base for Professional Nuesing Practice. 3rd edition. Englewood Cliffs: Prentice-Hall, 1990.

Παραπομπή σε μορφή MLA (8th εκδ.)

George, Julia B. Nursing Theories: The Base for Professional Nuesing Practice. 3rd edition. Prentice-Hall, 1990.