Sterling, E. L., & Cole, M. E. (1927). Important points in English usage: A laboratory method in the essentials of good English ([2nd experimental ed.].). [Press of S & S printers].
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিSterling, Edna L., এবং Miriam Elizabeth Cole. Important Points in English Usage: A Laboratory Method in the Essentials of Good English. [2nd experimental ed.]. [Seattle]: [Press of S & S printers], 1927.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিSterling, Edna L., এবং Miriam Elizabeth Cole. Important Points in English Usage: A Laboratory Method in the Essentials of Good English. [2nd experimental ed.]. [Press of S & S printers], 1927.
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