Cita APA

Lamb, B. M. (1991). Letts guide to cacti of the world: Cacti of the world. London: Charles Lett.

Chicago Style Citation

Lamb, Brian M. Letts Guide to Cacti of the World: Cacti of the World. London: Charles Lett, 1991.

Cita MLA

Lamb, Brian M. Letts Guide to Cacti of the World: Cacti of the World. London: Charles Lett, 1991.