http://www.issia.cnr.it/ http://www.ba.iac.cnr.it/wp/ https://ntnucamp.sce.ntnu.edu.tw/ http://leda.elfak.ni.ac.rs/

Gaya APA

Sumaryono, E. (1999). Dasar-dasar Logika . Yogyakarta, Indonesia: Penerbit Kanisius.

Gaya MLA

Sumaryono, E.. "Dasar-dasar Logika". Yogyakarta, Indonesia: Penerbit Kanisius, 1999. Academic.