APA

Puerto Rico, United States, . (19). Annual descriptive report of the Commonwealth Board for Vocation Education: Division of Vocational Education, to the Governor of Puerto Rico and the U.S. Office of Education, Department of Health Education. Washington, D.C: [Puerto Rico].

Chicago

Puerto Rico, United States, . 19. Annual descriptive report of the Commonwealth Board for Vocation Education: Division of Vocational Education, to the Governor of Puerto Rico and the U.S. Office of Education, Department of Health Education. Washington, D.C: [Puerto Rico].

Harvard

Puerto Rico, United States, . (19). Annual descriptive report of the Commonwealth Board for Vocation Education: Division of Vocational Education, to the Governor of Puerto Rico and the U.S. Office of Education, Department of Health Education. Washington, D.C: [Puerto Rico].

MLA

Puerto Rico, United States, . Annual descriptive report of the Commonwealth Board for Vocation Education: Division of Vocational Education, to the Governor of Puerto Rico and the U.S. Office of Education, Department of Health Education. Washington, D.C: [Puerto Rico]. 19.