Cita APA (7th ed.)
Westwood, J. O. (1839). An Introduction to the modern classification of insects.
Cita Chicago (17th ed.)
Westwood, John Obadiah. An Introduction to the Modern Classification of Insects. London, 1839.
Cita MLA (9th ed.)
Westwood, John Obadiah. An Introduction to the Modern Classification of Insects. 1839.
Atenció: Aquestes cites poden no estar 100% correctes.