APA (7th ed.) Citation

United States. Federal Communications Commission. (1974). Supplement to "Study guide and reference material for commercial operator examinations" revised May 15, 1955: Study material for commercial operator examinations. Federal Communications Commission.

Chicago Style (17th ed.) Citation

United States. Federal Communications Commission. Supplement to "Study Guide and Reference Material for Commercial Operator Examinations" Revised May 15, 1955: Study Material for Commercial Operator Examinations. Washington: Federal Communications Commission, 1974.

MLA (9th ed.) Citation

United States. Federal Communications Commission. Supplement to "Study Guide and Reference Material for Commercial Operator Examinations" Revised May 15, 1955: Study Material for Commercial Operator Examinations. Federal Communications Commission, 1974.