APA (7th ed.) Citation

Lewis, J. B. (1950). Coal fields of Hokkaido, Japan, other than Ishikari. [publisher not identified].

Chicago Style (17th ed.) Citation

Lewis, John B. Coal Fields of Hokkaido, Japan, Other than Ishikari. [Tokyo]: [publisher not identified], 1950.

MLA (9th ed.) Citation

Lewis, John B. Coal Fields of Hokkaido, Japan, Other than Ishikari. [publisher not identified], 1950.