Cita APA (7a ed.)

Welch, R. (1993). Animal farm (1st published, 13th imp.). Longman [etc.].

Cita Chicago Style (17a ed.)

Welch, Robert. Animal Farm. 1st published, 13th imp. Harlow [etc.]: Longman [etc.], 1993.

Cita MLA (9a ed.)

Welch, Robert. Animal Farm. 1st published, 13th imp. Longman [etc.], 1993.