Roberts, P. (1970). The Roberts English series: A linguistics program. Harcourt, Brace & World.
Chicagoスタイル(17版)引用形式Roberts, Paul. The Roberts English Series: A Linguistics Program. New York ; Chicago [etc.]: Harcourt, Brace & World, 1970.
MLA(8版)引用形式Roberts, Paul. The Roberts English Series: A Linguistics Program. Harcourt, Brace & World, 1970.
警告: この引用は必ずしも正確ではありません.