Cita APA (7th ed.)

Frenkel, R. E. (1970). Ruderal vegetation along some California roadside s. University of California Press.

Cita Chicago (17th ed.)

Frenkel, Robert E. Ruderal Vegetation Along Some California Roadside S. Berkeley: University of California Press, 1970.

Cita MLA (9th ed.)

Frenkel, Robert E. Ruderal Vegetation Along Some California Roadside S. University of California Press, 1970.