Gaya APA

Jalal, Zaidir. (). Dr. F.l. Tobing . : .

Gaya Chicago

Jalal, Zaidir. Dr. F.l. Tobing. : , . Text.

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Jalal, Zaidir. Dr. F.l. Tobing. : , . Text.

Gaya Turabian

Jalal, Zaidir. Dr. F.l. Tobing. : , . Print.