APA: Book with two or more authors

In a Reference List In-text Citation
Ruhen, O. and Shadbolt, M.  1971.  Isles of the South Pacific, National Geographic Society, Washington. (Ruhen and Shadbolt, 1971)
Ferrozzi, F. Garlashchi, G. Bova, D.  2000.  CT of metastases. New York: Springer. (Ferrozzi et al. 2000)