APA (7th ed.) Citation

Hamer, J., & Jones, J. A. P. (1986). The twentieth century (1. publ., reprinted.). MacMillan.

Chicago Style (17th ed.) Citation

Hamer, John, and J. A. P. Jones. The Twentieth Century. 1. publ., reprinted. London [u.a.]: MacMillan, 1986.

MLA (9th ed.) Citation

Hamer, John, and J. A. P. Jones. The Twentieth Century. 1. publ., reprinted. MacMillan, 1986.