APA (7th ed.) Citation

Peel, Powell, & Garrett. (1998). An introduction to 20th-century architecture. Grange Books.

Chicago Style (17th ed.) Citation

Peel, Powell, and Garrett. An Introduction to 20th-century Architecture. Kent: Grange Books, 1998.

MLA (8th ed.) Citation

Peel, et al. An Introduction to 20th-century Architecture. Grange Books, 1998.