Lietz, P. S. (1956). Calendar of Philippine documents in the Ayer Collection of the Newberry Library. Newberry Library.
Chicago-viite (17. p.)Lietz, Paul S. Calendar of Philippine Documents in the Ayer Collection of the Newberry Library. Chicago: Newberry Library, 1956.
MLA-viite (9. p.)Lietz, Paul S. Calendar of Philippine Documents in the Ayer Collection of the Newberry Library. Newberry Library, 1956.
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