Hoehn, Elaine N. Marieb, Katja (2008). Anatomy & physiology (3. ed.). San Francisco, Calif.: Pearson/Benjamin Cummings. pp. 391–395. ISBN 978-0-8053-0094-9.{{cite book}}: CS1 maint: multiple names: authors list (link) 978-0-8053-0094-9
Hoehn, Elaine N. Marieb, Katja (2008). Anatomy & physiology (3. ed.). San Francisco, Calif.: Pearson/Benjamin Cummings. pp. 391–395. ISBN 978-0-8053-0094-9.{{cite book}}: CS1 maint: multiple names: authors list (link) 978-0-8053-0094-9