ebrary, Inc, & Apanasov, B. N. (1992). Topology '90. W. de Gruyter.
芝加哥风格引文ebrary, Inc, 与 B. N. Apanasov. Topology '90. Berlin ; New York: W. de Gruyter, 1992.
MLA引文ebrary, Inc, 与 B. N. Apanasov. Topology '90. W. de Gruyter, 1992.
警告：这些引文格式不一定是100％准确.