Cita APA (7a ed.)

O'Brien, J. A., Elson, W. H., & Runkel, L. E. (1923). The Cathedral readers (Teacher's edition.). Scott, Foresman and Company.

Cita Chicago Style (17a ed.)

O'Brien, John A., William H. Elson, y Lura E. Runkel. The Cathedral Readers. Teacher's edition. Chicago ; Atlanta ; New York: Scott, Foresman and Company, 1923.

Cita MLA (8a ed.)

O'Brien, John A., et al. The Cathedral Readers. Teacher's edition. Scott, Foresman and Company, 1923.