Nabours, Robert K. (1930). "A Third Alternative: Emergent Evolution". The Scientific Monthly. 31 (5): 453–456. Bibcode:1930SciMo..31..453N. JSTOR15012.
Nabours, Robert K. (1930). "A Third Alternative: Emergent Evolution". The Scientific Monthly. 31 (5): 453–456. Bibcode:1930SciMo..31..453N. JSTOR15012.
Hoff, Charles (1986). "Evolutionary Theory: The Unfinished Synthesis by Robert G. B. Reid". Human Biology. 58 (5): 823–824. JSTOR41463815.
Cornell, John F. (1987). "Evolutionary Theory: The Unfinished Synthesis by Robert G. B. Reid". Journal of the History of Biology. 20 (3): 424–425. JSTOR4331027.