APA

Nicalas F. S. C., .Checklist of macroscopic troglobitic organisms of the United States. : .

Chicago

Nicalas F S C, .Checklist of macroscopic troglobitic organisms of the United States. : .

Harvard

Nicalas F. S. C., .Checklist of macroscopic troglobitic organisms of the United States. : .

MLA

Nicalas F S C, .: . .