Cita APA (7th ed.)

GWYNNE PETER/ JEFFRIES, B. (1998). SPACE AND PLANETS.

Cita Chicago (17th ed.)

GWYNNE PETER/ JEFFRIES, BRIAN. SPACE AND PLANETS. 1998.

Cita MLA (9th ed.)

GWYNNE PETER/ JEFFRIES, BRIAN. SPACE AND PLANETS. 1998.

Atenció: Aquestes cites poden no estar 100% correctes.