Cita APA (7th ed.)

Spence, I. (2003). Royal Horticultural Society garden plants and flowers. Dorling Kindersley.

Cita Chicago (17th ed.)

Spence, Ian. Royal Horticultural Society Garden Plants and Flowers. London: Dorling Kindersley, 2003.

Cita MLA (8th ed.)

Spence, Ian. Royal Horticultural Society Garden Plants and Flowers. Dorling Kindersley, 2003.