APA (7th ed.) Citation

Del Prado, M. G. (1927). "Important events and dates in the Bicol history". s.n.

Chicago Style (17th ed.) Citation

Del Prado, Mariano Goyena. "Important Events and Dates in the Bicol History". s.l: s.n, 1927.

MLA (9th ed.) Citation

Del Prado, Mariano Goyena. "Important Events and Dates in the Bicol History". s.n, 1927.