APA (7th ed.) Citation

Earl, A., & Earl, R. (1969). Are the pencils sharpened? Blackwell.

Chicago Style (17th ed.) Citation

Earl, Alan, and Roland Earl. Are the Pencils Sharpened? Oxford: Blackwell, 1969.

MLA (9th ed.) Citation

Earl, Alan, and Roland Earl. Are the Pencils Sharpened? Blackwell, 1969.

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