Blitzer, R. (2009). Introductory algebra: A custom edition for Portland Community College taken from Introductory algebra for college students (5th ed.). Pearson Prentice Hall.
Citazione stile Chigago Style (17a edizione)Blitzer, Robert. Introductory Algebra: A Custom Edition for Portland Community College Taken from Introductory Algebra for College Students. 5th ed. Upper Saddle River, N.J: Pearson Prentice Hall, 2009.
Citatione MLA (9a ed.)Blitzer, Robert. Introductory Algebra: A Custom Edition for Portland Community College Taken from Introductory Algebra for College Students. 5th ed. Pearson Prentice Hall, 2009.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.