In general, follow AP style.
For titles of compositions (books, movies, music, etc.), follow AP style and place in quotation marks: “Gone With the Wind,” “South Park,” “How to Save a Life”
For names of periodicals, including academic journals, follow AP style; use italics: The Denver Post, (Boulder) Daily Camera, New England Journal of Medicine
For names of articles in academic journals, use quotation marks and sentence case, rather than title case: “Characteristics of black carbon aerosol from a surface oil burn during the Deepwater Horizon oil spill” appeared in Geophysical Research Letters.