Citazione APA

Pearson, H. C., & Kirchwey, M. F. (1921). Essentials of English: Lower grades. American Book Co.

Stile di citazione Chicago

Pearson, Henry Carr, e Mary Frederika Kirchwey. Essentials of English: Lower Grades. New York, Cincinnati [etc.]: American Book Co, 1921.

Citazione MLA

Pearson, Henry Carr, e Mary Frederika Kirchwey. Essentials of English: Lower Grades. American Book Co, 1921.