APA (7th ed.) Citation

Goebel, K., Ganzenmuller, C. H., Bower, H. M., & Bower, F. O. (1926). Wilhelm Hofmeister: The work and life of a nineteenth century botanist.

Chicago Style (17th ed.) Citation

Goebel, K., Constanze Hofmeister Ganzenmuller, H. M. Bower, and F. O. Bower. Wilhelm Hofmeister: The Work and Life of a Nineteenth Century Botanist. 1926.

MLA (9th ed.) Citation

Goebel, K., et al. Wilhelm Hofmeister: The Work and Life of a Nineteenth Century Botanist. 1926.