APA

Puerto Rico, Puerto Rico, . (1959). Regulations relating to the income tax under the income tax of 1954: act no. 91 approved June 29, 1954. San Juan, P. R: Department of the Treasury.

Chicago

Puerto Rico, Puerto Rico, . 1959. Regulations relating to the income tax under the income tax of 1954: act no. 91 approved June 29, 1954. San Juan, P. R: Department of the Treasury.

Harvard

Puerto Rico, Puerto Rico, . (1959). Regulations relating to the income tax under the income tax of 1954: act no. 91 approved June 29, 1954. San Juan, P. R: Department of the Treasury.

MLA

Puerto Rico, Puerto Rico, . Regulations relating to the income tax under the income tax of 1954: act no. 91 approved June 29, 1954. San Juan, P. R: Department of the Treasury. 1959.