Cita APA (7a ed.)

RICHARDS, R. (1991). An Early Start To The Environment. Simon & Schuster.

Cita Chicago Style (17a ed.)

RICHARDS, Roy. An Early Start To The Environment. Simon & Schuster, 1991.

Cita MLA (8a ed.)

RICHARDS, Roy. An Early Start To The Environment. Simon & Schuster, 1991.