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Gaya APA

Zikmun, . (1980). Keppres 18-1981 (Penyempurnaan Keppres 14A-1980 Beserta Penjelasannya) . Indonesia: BP. Dharma Bhakti.

Gaya MLA

Zikmun, . "Keppres 18-1981 (Penyempurnaan Keppres 14A-1980 Beserta Penjelasannya)". Indonesia: BP. Dharma Bhakti, 1980. Text.