American Home Economics Association. (1977). Handbook for metric usage. American Home Economics Association.
Cita Chicago (17th ed.)American Home Economics Association. Handbook for Metric Usage. N.W., Washington: American Home Economics Association, 1977.
Cita MLA (9th ed.)American Home Economics Association. Handbook for Metric Usage. American Home Economics Association, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.