Cita APA (7a ed.)

Siedel, G. J. (1988). Present and future directions in ADR research. [s.n.].

Cita Chicago Style (17a ed.)

Siedel, George J. Present and Future Directions in ADR Research. [S.l.]: [s.n.], 1988.

Cita MLA (9a ed.)

Siedel, George J. Present and Future Directions in ADR Research. [s.n.], 1988.