APA (7th ed.) Citation

Erdtman, G., & Metcalfe, C. R. Affinities of certain genera incertae sedis suggested by pollen morphology and vegetative anatomy.

Chicago Style (17th ed.) Citation

Erdtman, G., and Charles R. Metcalfe. Affinities of Certain Genera Incertae Sedis Suggested by Pollen Morphology and Vegetative Anatomy.

MLA (9th ed.) Citation

Erdtman, G., and Charles R. Metcalfe. Affinities of Certain Genera Incertae Sedis Suggested by Pollen Morphology and Vegetative Anatomy.

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