Cita APA (7th ed.)

Hopper, L. J. (2011). Graphic standards field guide to softscape. Wiley.

Cita Chicago (17th ed.)

Hopper, Leonard J. Graphic Standards Field Guide to Softscape. Hoboken, N.J: Wiley, 2011.

Cita MLA (9th ed.)

Hopper, Leonard J. Graphic Standards Field Guide to Softscape. Wiley, 2011.