Style de citation APA

Gruffydd, B. (1987). Tree form, size and colour: A guide to selection planting and design. E & F.N.Spon.

Style de citation Chicago

Gruffydd, Bodfan. Tree Form, Size and Colour: A Guide to Selection Planting and Design. London: E & F.N.Spon, 1987.

Style de citation MLA

Gruffydd, Bodfan. Tree Form, Size and Colour: A Guide to Selection Planting and Design. E & F.N.Spon, 1987.