Pepper, H. W., & Rowe, J. J. . T. (1985). Individual Tree Protection. Her Majestys Stationery Office.
Cita Chicago (17th ed.)Pepper, H. W., i J J; Tee Rowe. Individual Tree Protection. London: Her Majestys Stationery Office, 1985.
Cita MLA (9th ed.)Pepper, H. W., i J J; Tee Rowe. Individual Tree Protection. Her Majestys Stationery Office, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.