APA-ийн эшлэл(7 дахь хэвлэлт)

Engel, P. C. (2009). Pain-free biochemistry: An essential guide for the health sciences. Wiley-Blackwell.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Engel, Paul C. Pain-free Biochemistry: An Essential Guide for the Health Sciences. Chichester, UK ; Hoboken, NJ: Wiley-Blackwell, 2009.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Engel, Paul C. Pain-free Biochemistry: An Essential Guide for the Health Sciences. Wiley-Blackwell, 2009.