The Governments of Europe (4th ed.).

MLA

Ayearst, Morley, and William Bennett Munro. The Governments of Europe (4th Ed.). New York, N.Y, 1954.

APA

Ayearst, M., & Munro, W. Bennett. (1954). The Governments of Europe (4th ed.). New York, N.Y.

Chicago

Ayearst, Morley, and William Bennett Munro. The Governments of Europe (4th Ed.). New York, N.Y., 1954.