Gaya APA

Roehler, G, G, D, ;, L, R. (1983). Building reading skills level III . Wheaton Illinois: McDougal, littell & company.

Gaya MLA

Roehler, Gerald, G., Duffy, ;, Laura, R.. "Building reading skills level III". Wheaton Illinois: McDougal, littell & company, 1983. Text.