Gekkan hyakka.
月刊 百科.
APA Citation
Heibonsha., 平凡社. Gekkan hyakka. Tōkyō: Heibonsha.
MLA Citation
Heibonsha, and 平凡社. Gekkan Hyakka. Tōkyō: Heibonsha,
Warning: These citations may not always be complete (especially for serials).