Cita APA (7th ed.)

Sheldon, S. (1988). The sand of time. HarperCollins Publishers.

Cita Chicago (17th ed.)

Sheldon, Sidney. The Sand of Time. London: HarperCollins Publishers, 1988.

Cita MLA (8th ed.)

Sheldon, Sidney. The Sand of Time. HarperCollins Publishers, 1988.