APA-referens (7:e uppl.)

Hardless, H. R. (1970). Handwriting and thumb-print identification and forensic science: With blocks, illus., sketches, etc. Law Book Co..

Chicago-referens (17:e uppl.)

Hardless, H. R. Handwriting and Thumb-print Identification and Forensic Science: With Blocks, Illus., Sketches, Etc. Allahabad: Law Book Co., 1970.

MLA-referens (8:e uppl.)

Hardless, H. R. Handwriting and Thumb-print Identification and Forensic Science: With Blocks, Illus., Sketches, Etc. Law Book Co., 1970.