APA

Skvarla, J. J., Nowicke, J. W. (1981). Pollen morphology and phylogenetic relationships of the Berberidaceae. .

Chicago

Skvarla, John J, Nowicke, Joan W. 1981. Pollen morphology and phylogenetic relationships of the Berberidaceae. .

Harvard

Skvarla, J. J., Nowicke, J. W. (1981). Pollen morphology and phylogenetic relationships of the Berberidaceae. .

MLA

Skvarla, John J, Nowicke, Joan W. Pollen morphology and phylogenetic relationships of the Berberidaceae. 1981.