APA (7th ed.) Citation

Rich Penny & Penny Rich. (1994). Practical Aromatherapy. parragon book service.

Chicago Style (17th ed.) Citation

Rich Penny and Penny Rich. Practical Aromatherapy. london: parragon book service, 1994.

MLA (9th ed.) Citation

Rich Penny and Penny Rich. Practical Aromatherapy. parragon book service, 1994.

Warning: These citations may not always be 100% accurate.