APA (7th ed.) Citation

Yapp, N. (1998). Decades of the 20th century (1. publ.). Könemann.

Chicago Style (17th ed.) Citation

Yapp, Nick. Decades of the 20th Century. 1. publ. Königswinter: Könemann, 1998.

MLA (9th ed.) Citation

Yapp, Nick. Decades of the 20th Century. 1. publ. Könemann, 1998.