APA (7th ed.) Citation

Wakai, N., Ohyama, N., & Koizumi, T. (1987). Manual of ionogram scaling (Third Version.).

Chicago Style (17th ed.) Citation

Wakai, N., N. Ohyama, and T. Koizumi. Manual of Ionogram Scaling. Third Version. [S.l. :$bs.n.,$c1987?], 1987.

MLA (9th ed.) Citation

Wakai, N., et al. Manual of Ionogram Scaling. Third Version. 1987.