Gaya APA

William H. Hayt, Jr, Jack E. Kemmerly. (). . : .

Gaya Chicago

William H. Hayt, Jr, Jack E. Kemmerly. . : , . .

Gaya MLA

William H. Hayt, Jr, Jack E. Kemmerly. . : , . .

Gaya Turabian

William H. Hayt, Jr, Jack E. Kemmerly. . : , . .