APA

Kattermann F., Lüthy J. M., Wallace R. S., Hunt D., Taylor N. P. & Zappi D. C. (1994). Eriosyce (cactaceae) : the genus revised and amplified. London: Royal Botanic Gardens, Kew.

Chicago

Kattermann Fred, Lüthy Jonas M, Wallace Robert S, Hunt David, Taylor Nigel P and Zappi Daniela C. 1994. Eriosyce (cactaceae) : the genus revised and amplified. London: Royal Botanic Gardens, Kew.

Harvard

Kattermann F., Lüthy J. M., Wallace R. S., Hunt D., Taylor N. P. and Zappi D. C. (1994). Eriosyce (cactaceae) : the genus revised and amplified. London: Royal Botanic Gardens, Kew.

MLA

Kattermann Fred, Lüthy Jonas M, Wallace Robert S, Hunt David, Taylor Nigel P and Zappi Daniela C. Eriosyce (cactaceae) : the genus revised and amplified. London: Royal Botanic Gardens, Kew. 1994.