Cortright, S., & Pokriots, W. (1996). Making backyard birdhouses: Attracting, feeding & housing your favorite birds (1st pbk. ed.). Sterling Pub. Co..
Cita Chicago Style (17a ed.)Cortright, Sandy, y Will Pokriots. Making Backyard Birdhouses: Attracting, Feeding & Housing Your Favorite Birds. 1st pbk. ed. New York: Sterling Pub. Co., 1996.
Cita MLA (8a ed.)Cortright, Sandy, y Will Pokriots. Making Backyard Birdhouses: Attracting, Feeding & Housing Your Favorite Birds. 1st pbk. ed. Sterling Pub. Co., 1996.
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