APA (7th ed.) Citation

Wee, C. (1971). Birds at the Jurong Bird Park. [publisher not identified].

Chicago Style (17th ed.) Citation

Wee, Chris. Birds at the Jurong Bird Park. Singapore: [publisher not identified], 1971.

MLA (9th ed.) Citation

Wee, Chris. Birds at the Jurong Bird Park. [publisher not identified], 1971.