Kapan Zaman Nanboku-cho dimulai?
Zaman Nanboku-cho
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Tanaka Takashi. Kyōyō Nihonshi (教養日本史). Ise: Seiseikikaku, 1997.
Heibonsha Nihonshi Jiten. Tokyo: Heibonsha, 2001. ISBN 4-582-12716-9