APA (7th ed.) Citation

Berkeley, E. (1963). John Clayton: Pioneer of American botany. Univ. of North Carolina.

Chicago Style (17th ed.) Citation

Berkeley, Edmund. John Clayton: Pioneer of American Botany. Chapel Hill: Univ. of North Carolina, 1963.

MLA (9th ed.) Citation

Berkeley, Edmund. John Clayton: Pioneer of American Botany. Univ. of North Carolina, 1963.

Warning: These citations may not always be 100% accurate.