APA (7th ed.) Citation

Piper, D. (1977). The companion guide to London (6.ed.). Collins.

Chicago Style (17th ed.) Citation

Piper, David. The Companion Guide to London. 6.ed. London: Collins, 1977.

MLA (9th ed.) Citation

Piper, David. The Companion Guide to London. 6.ed. Collins, 1977.