APA (7e ed.) Bronvermelding

DeCurtins, J. (2015). Ultimate plank fitness: For a strong core, killer abs - and a killer body. Fair Winds Press.

Chicago (17e ed.) Bronvermelding

DeCurtins, Jennifer. Ultimate Plank Fitness: For a Strong Core, Killer Abs - and a Killer Body. Beverly, MA: Fair Winds Press, 2015.

MLA (9e ed.) Bronvermelding

DeCurtins, Jennifer. Ultimate Plank Fitness: For a Strong Core, Killer Abs - and a Killer Body. Fair Winds Press, 2015.