APA (7th ed.) Citation

Piper, D. (1968). The companion guide to London (2. ed.). Collins.

Chicago Style (17th ed.) Citation

Piper, David. The Companion Guide to London. 2. ed. London: Collins, 1968.

MLA (9th ed.) Citation

Piper, David. The Companion Guide to London. 2. ed. Collins, 1968.