Title case is the way that the titles are normally capitalized with the major words capitalized and the minor words in lower case. Minor words, including articles (a, an, the), conjunctions (e.g. and, or, but), and prepositions (e.g. in, out, to, from, etc.) should be lower case unless they occur at the beginning of the title. In APA references, the names of journals, magazines and newspapers are given in title case:
The International Journal of Behavioral Nutrition and Physical Activity
People Magazine
The Globe and Mail