APA (7th ed.) Citation

Roberts, K. (1994). Past tense. Douglas & McIntyre.

Chicago Style (17th ed.) Citation

Roberts, Ken. Past Tense. Toronto, Ontario [u.a.]: Douglas & McIntyre, 1994.

MLA (9th ed.) Citation

Roberts, Ken. Past Tense. Douglas & McIntyre, 1994.

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