Παραπομπή APA

Tetley, L., & Calcutt, D. Electronic aids to navigation: :position fixing.

Παραπομπή Chicago Style

Tetley, L., και D. Calcutt. Electronic Aids to Navigation: :position Fixing. London.

Παραπομπή MLA

Tetley, L., και D. Calcutt. Electronic Aids to Navigation: :position Fixing.