APA

Keenan F., Tejada M., . (1984). Tropical timber for building materials in the andean grooup countries of South América. Ottawa: International Development Research Centre.

Chicago

Keenan F.j, Tejada Marcelo, . 1984. Tropical timber for building materials in the andean grooup countries of South América. Ottawa: International Development Research Centre.

Harvard

Keenan F., Tejada M., . (1984). Tropical timber for building materials in the andean grooup countries of South América. Ottawa: International Development Research Centre.

MLA

Keenan F.j, Tejada Marcelo, . Tropical timber for building materials in the andean grooup countries of South América. Ottawa: International Development Research Centre. 1984.