APA (7th ed.) Citation

Sugden, G. (1989). Typing (Gregg college typing, series four.).

Chicago Style (17th ed.) Citation

Sugden, Gill. Typing. Gregg college typing, series four. London :bPenguin Books, 1989.

MLA (9th ed.) Citation

Sugden, Gill. Typing. Gregg college typing, series four. 1989.

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