APA (7th ed.) Citation

Shell Petroleum Company Limited (Great Britain). (1955). Know your tractor: A Shell guide. [publisher not identified].

Chicago Style (17th ed.) Citation

Shell Petroleum Company Limited (Great Britain). Know Your Tractor: A Shell Guide. London: [publisher not identified], 1955.

MLA (9th ed.) Citation

Shell Petroleum Company Limited (Great Britain). Know Your Tractor: A Shell Guide. [publisher not identified], 1955.

Warning: These citations may not always be 100% accurate.