APA

Whitehead D. R., .Annotated key to Platynus, Including Mexisphodrus and most "colpodes", so far described from North America Including Mexico (Coleoptera: Carabidae: Agonini). : .

Chicago

Whitehead Donald R, .Annotated key to Platynus, Including Mexisphodrus and most "colpodes", so far described from North America Including Mexico (Coleoptera: Carabidae: Agonini). : .

Harvard

Whitehead D. R., .Annotated key to Platynus, Including Mexisphodrus and most "colpodes", so far described from North America Including Mexico (Coleoptera: Carabidae: Agonini). : .

MLA

Whitehead Donald R, .: . .