APA Edition Citation

Hornby, A., & Mackin, R. (1968). Oxford progressive English alternate course. 4V.

Chicago Edition Citation

Hornby, As, and R. Mackin. Oxford Progressive English Alternate Course. 4V. 1968.

MLA Edition Citation

Hornby, As, and R. Mackin. Oxford Progressive English Alternate Course. 4V. 1968.

Warning: These citations may not always be 100% accurate.