Cita APA (7th ed.)

Gilbert, M. F. (1977). Petrella at Q. Hodder & Stoughton.

Cita Chicago (17th ed.)

Gilbert, Michael Francis. Petrella at Q. London: Hodder & Stoughton, 1977.

Cita MLA (8th ed.)

Gilbert, Michael Francis. Petrella at Q. Hodder & Stoughton, 1977.