Royal Horticultural Society encyclopedia of perennials

MLA

Rice, Graham. Royal Horticultural Society Encyclopedia of Perennials. [New ed.]. London: Dorling Kindersley, 2011.

APA

Rice, G. (2011). Royal Horticultural Society encyclopedia of perennials. [New ed.]. London: Dorling Kindersley.

Chicago

Rice, Graham. Royal Horticultural Society Encyclopedia of Perennials. [New ed.]. London: Dorling Kindersley, 2011.