APA (7th ed.) Citation

Fons de l'Agencia Literaria Carmen Balcells (Biblioteca de Catalunya), Owen, E. R. J., & Sutcliffe, R. B. (1972). Studies in the theory of imperialism. Longman.

Chicago Style (17th ed.) Citation

Fons de l'Agencia Literaria Carmen Balcells (Biblioteca de Catalunya), Edward Roger John Owen, and Robert B. Sutcliffe. Studies in the Theory of Imperialism. London: Longman, 1972.

MLA (9th ed.) Citation

Fons de l'Agencia Literaria Carmen Balcells (Biblioteca de Catalunya), et al. Studies in the Theory of Imperialism. Longman, 1972.