APA (7th ed.) Citation

Zamora, C. V., & Lacdan, N. F. (1980). A survey of the chromosome number of Philippine ferns. s.n.].

Chicago Style (17th ed.) Citation

Zamora, Cecilia Vargas, and Natividad F. Lacdan. A Survey of the Chromosome Number of Philippine Ferns. [S.l: s.n.], 1980.

MLA (9th ed.) Citation

Zamora, Cecilia Vargas, and Natividad F. Lacdan. A Survey of the Chromosome Number of Philippine Ferns. s.n.], 1980.