Topping, J. (1971). Errors of observation and their treatment (3rd ed.). London.
استشهاد بنمط شيكاغوTopping, J. Errors of Observation and Their Treatment. 3rd ed. London, 1971.
MLA استشهادTopping, J. Errors of Observation and Their Treatment. 3rd ed. London, 1971.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.