Cita APA

Roberts, G., & Thornley, G. C. (1991). An Outline of English literature.

Citación estilo Chicago

Roberts, Gwyneth, y G C. Thornley. An Outline of English Literature. Hyderabad, Orient Longman, 1991.

Cita MLA

Roberts, Gwyneth, y G C. Thornley. An Outline of English Literature. 1991.