Nock, O. S. British locomotives of the 20th century. Stephens.
Chicago Style (17th ed.) CitationNock, O. S. British Locomotives of the 20th Century. Cambridge: Stephens.
MLA (9th ed.) CitationNock, O. S. British Locomotives of the 20th Century. Stephens.
Warning: These citations may not always be 100% accurate.