Ferguson, I. K., & Muller, J. (1976). The Evolutionary significance of the exine. Published for the Linnean Society of London by Academic Press.

Ferguson, Ian Keith, and J. Muller. The Evolutionary Significance of the Exine. London: Published for the Linnean Society of London by Academic Press, 1976.

Ferguson, Ian Keith, and J. Muller. The Evolutionary Significance of the Exine. Published for the Linnean Society of London by Academic Press, 1976.