APA

Cronquist A., . (1992). An integrated system of classification of flowering plants. New York: Columbia University Press.

Chicago

Cronquist Arthur, . 1992. An integrated system of classification of flowering plants. New York: Columbia University Press.

Harvard

Cronquist A., . (1992). An integrated system of classification of flowering plants. New York: Columbia University Press.

MLA

Cronquist Arthur, . An integrated system of classification of flowering plants. New York: Columbia University Press. 1992.