Gaya APA

Bangert, J., Diedrich, W, M. (1980). Articulation learning / William M. Diedrich, Jeff Bangert . Texas: .

Gaya MLA

Bangert, Jeff., Diedrich, William, M.. "Articulation learning / William M. Diedrich, Jeff Bangert". Texas: , 1980. Skripsi.