Cita APA

Berkeley, E. 1., & Berkeley, D. S. 1. (1963). John Clayton, pioneer of American botany. Chapel Hill: The University of North Carolina.

Citación estilo Chicago

Berkeley, Edmund 1912-1993, y Dorothy Smith 1911-1994 Berkeley. John Clayton, Pioneer of American Botany. Chapel Hill: The University of North Carolina, 1963.

Cita MLA

Berkeley, Edmund 1912-1993, y Dorothy Smith 1911-1994 Berkeley. John Clayton, Pioneer of American Botany. Chapel Hill: The University of North Carolina, 1963.