APA (7th ed.) Citation

Colquhoun, A. R. (1900). The problem in China and British policy. P. S. King.

Chicago Style (17th ed.) Citation

Colquhoun, Archibald R. The Problem in China and British Policy. London: P. S. King, 1900.

MLA (9th ed.) Citation

Colquhoun, Archibald R. The Problem in China and British Policy. P. S. King, 1900.