Cita APA (7th ed.)
Etherington, J., & Amstrong, W. (1975). Environment and plant ecology. John Wiley & Sons.
Cita Chicago (17th ed.)
Etherington, John, i W. Amstrong. Environment and Plant Ecology. London: John Wiley & Sons, 1975.
Cita MLA (9th ed.)
Etherington, John, i W. Amstrong. Environment and Plant Ecology. John Wiley & Sons, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.