Lawrence, P. (1992). Qualifications: Survey and mapping qualifications for the 1990s. London : British Cartographic Society.
Chicago Style (17. basım) AtıfLawrence, Peter. Qualifications: Survey and Mapping Qualifications for the 1990s. London : British Cartographic Society, 1992.
MLA (9th ed.) AtıfLawrence, Peter. Qualifications: Survey and Mapping Qualifications for the 1990s. London : British Cartographic Society, 1992.
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