A few options,

In T. Kufel's words, " . . .
In T. Kufel's view, " . .


The author says that "...."
etc.
The author notes . . .
The author believes . . . The author observes . . .
The author comments . . . The author relates . . .
The author declares . . . The author remarks . . .
The author discusses . . . The author reports . . .
The author explains . . . The author reveals . . .
The author expresses . . . The author states . . .
The author mentions . . . The author acknowledges . . .
The author suggests . . . The author thinks . . .
The author points out . . . The author responds . . .
The author shows . . . The author confirms . . .


The author agrees . . . The author rejects . . .
The author argues . . . The author compares . . . (the two studies)
The author asserts . . . The author admits . . .
The author cautions . . . The author disputes . . .
The author emphasizes . . . The author contends . . .
The author insists . . . The author denies . . .
The author maintains . . . The author refutes . . .
The author claims . . . The author endorses . . .

https://www.gallaudet.edu/tip/english-center/writing/quoting...