Cita APA

Fitch, W. K. (1948). POINTS FROM LETTERS: Vaccination.

Chicago Style Citation

Fitch, W. K. POINTS FROM LETTERS: Vaccination. 1948.

Cita MLA

Fitch, W. K. POINTS FROM LETTERS: Vaccination. 1948.

Atenció: Aquestes cites poden no estar 100% correctes.