Não informado. (1938). Gradwohl laboratory digest. International Society of Clinical Laboratory Technologists.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Gradwohl Laboratory Digest. Saint Louis, Mo: International Society of Clinical Laboratory Technologists, 1938.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Gradwohl Laboratory Digest. International Society of Clinical Laboratory Technologists, 1938.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.