Gibbs, M., & Carla, C. (1985). Crop productivity - research imperatives revisited: An international conference held at Boyne Highlands Inn, Harbor Springs, Michigan, October 11-13, 1985. [n.s].
Chicago-Zitierstil (17. Ausg.)Gibbs, Martin, und Carlson Carla. Crop Productivity - Research Imperatives Revisited: An International Conference Held at Boyne Highlands Inn, Harbor Springs, Michigan, October 11-13, 1985. [n.p]: [n.s], 1985.
MLA-Zitierstil (9. Ausg.)Gibbs, Martin, und Carlson Carla. Crop Productivity - Research Imperatives Revisited: An International Conference Held at Boyne Highlands Inn, Harbor Springs, Michigan, October 11-13, 1985. [n.s], 1985.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.