APA (7th ed.) Citation

The I.L.O. year-book 1931-1939. 2nd-9th year of issue. International Labour Offcie.

Chicago Style (17th ed.) Citation

The I.L.O. Year-book 1931-1939. 2nd-9th Year of Issue. International Labour Offcie.

MLA (8th ed.) Citation

The I.L.O. Year-book 1931-1939. 2nd-9th Year of Issue. International Labour Offcie.

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