APA (7th ed.) Citation

Brown, S. G. (1999). Practical astrology by numbers. Carroll & Brown Publishers Limited.

Chicago Style (17th ed.) Citation

Brown, Simon G. Practical Astrology by Numbers. London: Carroll & Brown Publishers Limited, 1999.

MLA (9th ed.) Citation

Brown, Simon G. Practical Astrology by Numbers. Carroll & Brown Publishers Limited, 1999.