Helgeson, D. V. (1985). Handbook for writing technical proposals that win contracts. Prentice-Hall.
Cita Chicago (17th ed.)Helgeson, Donald V. Handbook for Writing Technical Proposals That Win Contracts. Englewood Cliffs, N.J: Prentice-Hall, 1985.
Cita MLA (9th ed.)Helgeson, Donald V. Handbook for Writing Technical Proposals That Win Contracts. Prentice-Hall, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.