APA

Howden H. F., Gill B. D., .Mesoamerican Onthophagus Latreille in the dicranius and mirabilis species groups. : .

Chicago

Howden H F, Gill B D, .Mesoamerican Onthophagus Latreille in the dicranius and mirabilis species groups. : .

Harvard

Howden H. F., Gill B. D., .Mesoamerican Onthophagus Latreille in the dicranius and mirabilis species groups. : .

MLA

Howden H F, Gill B D, .: . .