APA (7th ed.) Citation

Aguirre, E. L. (1985). The second coming: 1986 marks comet Halley's second return this century. National Research Council of the Philippines.

Chicago Style (17th ed.) Citation

Aguirre, Edwin L. The Second Coming: 1986 Marks Comet Halley's Second Return This Century. Taguig, Metro Manila: National Research Council of the Philippines, 1985.

MLA (9th ed.) Citation

Aguirre, Edwin L. The Second Coming: 1986 Marks Comet Halley's Second Return This Century. National Research Council of the Philippines, 1985.