Citace podle APA (7th ed.)

European Conference on Geographical Information Systems Brussels, Scholten, H. J., Harts, J., & Ottens, H. F. L. (1991). EGIS '91: Proceedings : second European Conference on Geographical Information Systems, Brussels, Belgium April 2-5, 1991. EGIS Foundation.

Citace podle Chicago (17th ed.)

European Conference on Geographical Information Systems Brussels, H. J. Scholten, JanJaap Harts, a Henk F. L. Ottens. EGIS '91: Proceedings : Second European Conference on Geographical Information Systems, Brussels, Belgium April 2-5, 1991. Utrecht, Netherlands: EGIS Foundation, 1991.

Citace podle MLA (8th ed.)

European Conference on Geographical Information Systems Brussels, et al. EGIS '91: Proceedings : Second European Conference on Geographical Information Systems, Brussels, Belgium April 2-5, 1991. EGIS Foundation, 1991.

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