Cita APA (7a ed.)

Gray, J. W. (1990). Shipping futures (2nd ed.). Lloyd's of London Press.

Cita Chicago Style (17a ed.)

Gray, James Whiteside. Shipping Futures. 2nd ed. London [etc.]: Lloyd's of London Press, 1990.

Cita MLA (9a ed.)

Gray, James Whiteside. Shipping Futures. 2nd ed. Lloyd's of London Press, 1990.