It depends on the focus of your work. In a dissertation on a single author or title—say, Gabriel Marcel’s Being and Having: An Existentialist Diary—it would be overkill to introduce the author and full title of the work anew in each chapter. References to the author’s last name and a shortened title are sufficient.

But if your work focuses more broadly, use judgment. For example, in a book primarily discussing a few core texts—say, Virginia Woolf’s A Room of One’s Own, E. M. Forster’s A Passage to India, and James Joyce’s A Portrait of the Artist as a Young Man—subsequent references to Woolf’s Room, Forster’s Passage, and Joyce’s Portrait are likely sufficient, even if, for clarity, the other, ancillary primary and secondary works you discuss are reintroduced in full when first mentioned in each chapter.

In a topical work—say, on the representations of funerals in dozens of works or on poets of the beat generation—you would likely want to reintroduce authors and texts in full when first mentioned in each chapter.

Clarity for readers is the ultimate goal, but so too is avoiding trying their patience.