Cita APA (7th ed.)

Roozen, W. (1948). Flowers in colour (1a. ed.). Collins.

Cita Chicago (17th ed.)

Roozen, Walter. Flowers in Colour. 1a. ed. Londres: Collins, 1948.

Cita MLA (9th ed.)

Roozen, Walter. Flowers in Colour. 1a. ed. Collins, 1948.