APA (7th ed.) Citation

Nock, O. S. (1983). British locomotives of the 20th century. P. Stephens.

Chicago Style (17th ed.) Citation

Nock, O. S. British Locomotives of the 20th Century. Cambridge: P. Stephens, 1983.

MLA (8th ed.) Citation

Nock, O. S. British Locomotives of the 20th Century. P. Stephens, 1983.