Smith, H. (1985). Porto Bello Gold. Kinderbuchverlag.
Cita Chicago (17th ed.)Smith, Howden. Porto Bello Gold. Berlin: Kinderbuchverlag, 1985.
Cita MLA (8th ed.)Smith, Howden. Porto Bello Gold. Kinderbuchverlag, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.