APA (7th ed.) Citation

Kemp, I., & Kemp, P. K. (1969). British G.I. in Vietnam. Hale.

Chicago Style (17th ed.) Citation

Kemp, Ian, and Peter Kemp Kemp. British G.I. in Vietnam. London: Hale, 1969.

MLA (9th ed.) Citation

Kemp, Ian, and Peter Kemp Kemp. British G.I. in Vietnam. Hale, 1969.