Gaya APA

Bredow, S, J, P, T, S. (2013). Middle range theories: aplication to nursing research (3). Philadelphia: Lippincott Williams and Wilkins.

Gaya MLA

Bredow, Sandra, J., Peterson,, Timothy, S.. "Middle range theories: aplication to nursing research". 3 Philadelphia: Lippincott Williams and Wilkins, 2013. Text.