Cita APA (7th ed.)

Barbour, I. G. (1976). Finite resources and the human future. Augsburg.

Cita Chicago (17th ed.)

Barbour, Ian G. Finite Resources and the Human Future. Minnesota: Augsburg, 1976.

Cita MLA (9th ed.)

Barbour, Ian G. Finite Resources and the Human Future. Augsburg, 1976.

Atenció: Aquestes cites poden no estar 100% correctes.