APA (7th ed.) Citation

Humphry, D., & Ward, M. (1974). Passports and politics. Penguin Books.

Chicago Style (17th ed.) Citation

Humphry, Derek, and Michael Ward. Passports and Politics. Harmondsworth: Penguin Books, 1974.

MLA (9th ed.) Citation

Humphry, Derek, and Michael Ward. Passports and Politics. Penguin Books, 1974.

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