Cita APA (7th ed.)

Gramlich, E. M., & Koshel, P. P. (1975). Educational performance contracting. Brookings Institution.

Cita Chicago (17th ed.)

Gramlich, Edward M., i Patricia P. Koshel. Educational Performance Contracting. Washington: Brookings Institution, 1975.

Cita MLA (9th ed.)

Gramlich, Edward M., i Patricia P. Koshel. Educational Performance Contracting. Brookings Institution, 1975.