Cita APA (7a ed.)

Walker, L. J. (1920). The problem of reunion: Discussed historically in seven essays. Longmans, Green and Co.

Cita Chicago Style (17a ed.)

Walker, Leslie J. The Problem of Reunion: Discussed Historically in Seven Essays. London [etc]: Longmans, Green and Co, 1920.

Cita MLA (9a ed.)

Walker, Leslie J. The Problem of Reunion: Discussed Historically in Seven Essays. Longmans, Green and Co, 1920.