Hopper, L. J. (2011). Graphic standards field guide to softscape. Wiley.
Chicagoスタイル(17版)引用形式Hopper, Leonard J. Graphic Standards Field Guide to Softscape. Hoboken, N.J: Wiley, 2011.
MLA(9版)引用形式Hopper, Leonard J. Graphic Standards Field Guide to Softscape. Wiley, 2011.
警告: この引用は必ずしも正確ではありません.