(1938). Vol. 16, № 2 (Vol. 30, № 4); Industrial and Engineering Chemistry. New Edition. 1938.
Lua i Stíl Chicago (17ú heag.)Vol. 16, № 2 (Vol. 30, № 4); Industrial and Engineering Chemistry. New Edition. 1938, 1938.
Lua MLA (9ú heag.)Vol. 16, № 2 (Vol. 30, № 4); Industrial and Engineering Chemistry. New Edition. 1938, 1938.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.