Gaya APA

Walker, L, O., Avant, K, C. (1988). Strategies for Theory Construction in Nursing (2nd Ed). California: Prentice-Hall.

Gaya MLA

Walker, Lorraine, Olszewski., Avant, Kay, Coalson. "Strategies for Theory Construction in Nursing". 2nd Ed California: Prentice-Hall, 1988. Text.