APA aipamena

Hoefer, H. J., Eu, G., & Ng, S. S. (1988). Singapore. APA Pulications.

Chicago Style aipamena

Hoefer, Hans Johannes, Geoffrey Eu, and Swee San Ng. Singapore. Hong Kong: APA Pulications, 1988.

MLA aipamena

Hoefer, Hans Johannes, et al. Singapore. APA Pulications, 1988.