APA (7th ed.) Citation

Delfs, R. (1959). Graduated exercises in English. Agarthis Press.

Chicago Style (17th ed.) Citation

Delfs, Robert. Graduated Exercises in English. [Madrid]: Agarthis Press, 1959.

MLA (9th ed.) Citation

Delfs, Robert. Graduated Exercises in English. Agarthis Press, 1959.

Warning: These citations may not always be 100% accurate.