APA (7e ed.) Bronvermelding

Portland Community College Faculty. (2018). Open Resources for Community College Algebra. Portland Community College.

Chicago (17e ed.) Bronvermelding

Portland Community College Faculty. Open Resources for Community College Algebra. Portland, Oregon: Portland Community College, 2018.

MLA (9e ed.) Bronvermelding

Portland Community College Faculty. Open Resources for Community College Algebra. Portland Community College, 2018.