APA

Howden H. F., .New genus and four new species of new world Trichiinae (Coleoptera: Scarabaeidae). : .

Chicago

Howden Henry F, .New genus and four new species of new world Trichiinae (Coleoptera: Scarabaeidae). : .

Harvard

Howden H. F., .New genus and four new species of new world Trichiinae (Coleoptera: Scarabaeidae). : .

MLA

Howden Henry F, .: . .