APA (7th ed.) Citation

Trask, R. L. (1997). The Penguin guide to punctuation / R.L. Trask. Penguin.

Chicago Style (17th ed.) Citation

Trask, R. L. The Penguin Guide to Punctuation / R.L. Trask. London: Penguin, 1997.

MLA (9th ed.) Citation

Trask, R. L. The Penguin Guide to Punctuation / R.L. Trask. Penguin, 1997.

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