Gaya APA

Showers, B, J, W, W, B. (1992,1986,1980,1972). MODELS of TEACHING . Sebastopol, CA: Allyn and Bacon.

Gaya MLA

Showers, Bruce, Joyce,Marsha, Weil,, With, Beverly. "MODELS of TEACHING". Sebastopol, CA: Allyn and Bacon, 1992,1986,1980,1972. Text.